Plug Jack Conductive Layer Grounding for Static and Water Protection

The patent extracts the waterproofing function from the entire cell phone shell and concentrates it only at the plug jack slot area. By applying waterproof coating only to the inner wall of the slot rather than the whole device, the solution prevents water ingress at the critical vulnerability point while leaving the rest of the phone shell touchable and operable.

The patent applies different properties to different parts of the slot structure. The inner wall of the slot receives waterproof coating treatment while the mouth area remains open and accessible. This local differentiation allows water resistance where needed without compromising overall usability.

The patent removes the need for physical waterproof plugs by extracting the waterproofing function and integrating it directly into the slot structure through coating. This eliminates the separate waterproof plug component that caused operational inconvenience and static accumulation issues.

The waterproof coating acts as an intermediary layer between the external environment and the internal circuit board. It provides water protection without requiring physical plugs, allowing direct connection while blocking water molecules through the coating barrier.

The patent removes the waterproof plug component that generated static electricity during insertion and removal. By integrating waterproofing into the slot coating itself, the solution eliminates the mechanical plug that caused static accumulation and discharge issues during static testing.

The patent replaces the mechanical waterproof plug system with a chemical/coating-based waterproof barrier. This substitution eliminates the mechanical insertion and removal actions that generated static electricity, thereby improving anti-static performance while maintaining water resistance.